<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
    <script>
        window.onload = function(){
            var vm = new Vue({
                el:'#app',
                data:{ // 数据仓库
                    msg:'hello world'
                }
            })
        }
    </script>
</head>
<body>
    <div id="app">
        <p>{{ msg }}</p>
        <!-- v-model是一个指令 -->
        <input type="text" v-model="msg">
    </div>
</body>
</html>